A basic concept in population genetics that relates the gene frequency to the genotype frequency. The Hardy-Weinberg law can be used, for example, to determine allele frequency and heterozygote frequency when the incidence of a genetic disorder is known.
Something that promotes emptying of the bowels. Laxatives are used to combat constipation. They are sometimes overused, producing diarrhea. Laxatives include milk of magnesia and many others.
- Lay midwife
A midwife who has entered the profession as an apprentice to a practicing midwife rather than attending a formal school program.
- Lazy eye
An eye that diverges in gaze. A lazy eye is formally called strabismus. A lazy eye (strabismus) can be due to esotropia (cross-eyed) or to exotropia (wall-eyed). The danger of the condition is that the brain comes in time to rely more on one eye than the other and that part of the brain circuitry […]
- L1-L5 (lumbar vertebrae)
The symbols L1 through L5 represent the five lumbar vertebrae. The lumbar vertebrae are situated between the thoracic vertebrae and the sacral vertebrae in the spinal column.
Abbreviation for levorotatory, applied to a chemical compound, as in l-dopa. Levorotary is opposed to dextrorotary which is abbreviated as d-. From the Latin laevus, on the left-hand side.